\documentclass{standalone}
\usepackage{tikz}
\usepackage{ctex,siunitx}
\setCJKmainfont{Noto Serif CJK SC}
\usepackage{tkz-euclide}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{circuitikz}
\usetikzlibrary{patterns, calc}
\usetikzlibrary {decorations.pathmorphing, decorations.pathreplacing, decorations.shapes,}
\ctikzset{bipoles/length=1cm}
\begin{document}
\small
\begin{circuitikz}[>=latex, scale=1.2,european]
  % \useasboundingbox(0.9,0)rectangle(5.1,5);
  \draw (0,0) --(1,0) to [rmeter, t=mA] (2,0); 
  \draw [dashed](2,0)--(3,0)--node[right]{$B$}(3,2)--(2,2);
  \draw (0.8,0) to [rmeter, t=V, *-*] (.8,2); 
  \draw(2,0)--node[right]{$E$}(2,2)--(0,2)to [battery] (0,0);
  \node at (-.5,1){$A$};
\end{circuitikz}
\end{document}